Introduction
If your volume buttons are not working properly follow this guide to replace them.
Tools
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            Slide the wide plastic opening tool across the seem, separating it if you can't pry the device open using just the spudger. 
 
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            Un-solder the yellow, red, and black wires that connect the volume module to the motherboard. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.